Prayer During Travel
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 59
وَ كَانَ رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ يُصَلِّي عَلَى رَاحِلَتِهِ اَلْفَرِيضَةَ فِي يَوْمٍ مَطِيرٍ.
The Messenger of Allah صلى الله عليه وعلى آله وسلم would perform the obligatory prayer on his mount on a rainy day.
- Ṣaḥīḥ al-Faqīh